roman-arabic-numerals.cpp

#include <iostream>

using namespace std;

int rom_arab(string p){
    int z = 0;
    try{
        for(int i = 0; i < p.length(); i ++){
            if(tolower(p[i]) == 'i'){
                try{
                    if(tolower(p[i+1]) == 'v' || tolower(p[i+1]) == 'x'){ 
                        z -= 1;
                    }
                    else{
                        z += 1;
                    }
                }
                catch(...){
                    z += 1;
                }
            }
            else if(tolower(p[i]) == 'v'){
                z += 5;
            }
            else if(tolower(p[i]) == 'x'){
                try{
                    if(tolower(p[i+1]) == 'c' || tolower(p[i+1]) == 'l'){
                        z -= 10;
                    }
                    else{
                        z += 10;
                    }
                }
                catch(...){
                    z += 10;
                }
            }
            else if(tolower(p[i]) == 'l'){
                z += 50;
            }
            else if(tolower(p[i]) == 'c'){
                try{
                    if(tolower(p[i+1]) == 'm' || tolower(p[i+1]) == 'd'){ 
                        z -= 100;
                    }
                    else{
                        z += 100;
                    }
                }
                catch(...){
                    z += 100;
                }
            }
            else if(tolower(p[i]) == 'd'){
                z += 500;
            }
            else if(tolower(p[i]) == 'm'){
                z += 1000;
            }
            else{
                cout << "Uncorrect input" << endl;
                return 0;
            }
        }
    }
    catch(...){
        cout << "Uncorrect input" << endl;
        return 0;
    }
    return z;
}

string arab_rom(int s){
    string v = "";
    try{
        while(s > 0){
            if(s >= 1000){
                s -= 1000;
                v += "M";
            }
            else if(s >= 900){
                s -= 900;
                v += "CM";
            }
            else if(s >= 500){
                s -= 500;
                v += "D";
            }
            else if(s >= 400){
                s -= 400;
                v += "CD";
            }
            else if(s >= 100){
                s -= 100;
                v += "C";
            }
            else if(s >= 90){
                s -= 90;
                v += "XC";
            }
            else if(s >= 50){
                s -= 50;
                v += "L";
            }
            else if(s >= 40){
                s -= 40;
                v += "XL";
            }
            else if(s >= 10){
                s -= 10;
                v += "X";
            }
            else if(s >= 9){
                s -= 9;
                v += "IX";
            }
            else if(s >= 5){
                s -= 5;
                v += "V";
            }
            else if(s >= 4){
                s -= 4;
                v += "IV";
            }
            else if(s >= 1){
                s -= 1;
                v += "I";
            }
        }
    }
    catch(...){
        cout << "Uncorrect input" << endl;
        return "";
    }
    return v;
}

int main(){
    return 0;
}